4.Â Configuring the si driver

The Specialix SI/XIO and SX multiport cards use the
si driver. A single machine can have
up to 4 host cards. The following host cards are
supported:

ISA SI/XIO host card (2 versions)

EISA SI/XIO host card

PCI SI/XIO host card

ISA SX host card

PCI SX host card

Although the SX and SI/XIO host cards look markedly
different, their functionality are basically the same. The
host cards do not use I/O locations, but instead require a 32K
chunk of memory. The factory configuration for ISA cards
places this at 0xd0000-0xd7fff. They also
require an IRQ. PCI cards will, of course, auto-configure
themselves.

You can attach up to 4 external modules to each host
card. The external modules contain either 4 or 8 serial
ports. They come in the following varieties:

SI 4 or 8 port modules. Up to 57600 bps on each port
supported.

XIO 8 port modules. Up to 115200 bps on each port
supported. One type of XIO module has 7 serial and 1 parallel
port.

SXDC 8 port modules. Up to 921600 bps on each port
supported. Like XIO, a module is available with one parallel
port as well.

To configure an ISA host card, add the following line to
your kernel configuration file, changing the numbers as
appropriate: